Tag: recycling of paper

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Questions Related to recycling of paper

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

Select the correct sequence of the process of paper recycling.

  1. Collection, sorting, pulping, deinking

  2. Collection, pulping, sorting, deinking

  3. Collection, deinking, sorting, pulping

  4. Deinking, sorting, pulping
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Paper, torn clothes and metallic and plastic discards are recyclable wastes. Recycling is processing used materials (waste) into new, useful products. This is done to reduce the use of raw materials that would have been used. Paper recycling is a process wherein, a paper that is used, discarded by the consumer, is collected and transported to paper mills. Here, it is sorted and is mixed with water and chemicals and converted into paper pulp. Deinking is carried out to remove printing ink from the paper fibers from the pulp and transformed into reusable form.

Thus, the correct answer is option A.

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

Which of the following human activity can maintain the biological equilibrium?

  1. Poaching endangered animals

  2. Recycling of paper

  3. Deforestation

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Recycling is the process by which the product is recycled and made available to use again. The recycling of paper not only saves valuable space in our landfills, but it also helps reduce greenhouse gas emissions and when one recycle, one also have to use fewer resources like water and energy to turn that item into another usable item. If the paper is recycled, fewer trees will be cut down for paper pulp. This will help to maintain the biological equilibrium in the ecosystem.

Thus, the correct answer is option B. 

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

Carbon chloride is used in

  1. Bleaching of new paper

  2. Bleaching of recycled paper

  3. Bleaching of clothes

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carbon tetrachloride (often referred to in older texts as carbon chloride) was historically used in various industrial processes, including the bleaching and cleaning of recycled paper fibers.

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

The process of conversion of paper material into the slurry substance is called as

  1. Sorting

  2. Shredding

  3. Pulping

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The process of waste paper recycling involves mixing of used paper with water and chemicals to break it down. It is then chopped up and heated, which breaks down the paper further into strands of cellulose, a type of organic plant material. This resulting mixture is called as pulp or slurry. This process is called as pulping. 

Thus, the correct answer is option C.  

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

Recycling 1 ton of paper saves

  1. 7000 gallons of water

  2. 17 trees

  3. Both A and B

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During the production of paper from the wood pulp, about 7000 gallons of water is used. If the paper is recycled, then this large amount of water can be saved. Studies have proven that one ton of paper is equivalent to seventeen fully grown trees. The paper is made from wood pulp. The trees are cut down for making paper. By saving and recycling of the paper, we can help to prevent deforestation. 

Thus, the correct answer is option C. 

Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

The common bleaching agent of recycled paper is

  1. Hydrogen peroxide

  2. Sodium hydrosulfite

  3. Chlorine

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Paper recycling is a process wherein, the paper that is used, discarded by the consumer, is collected and transported to paper mills. The papers are mixed with water and chemicals, broken down, converted into paper pulp and transformed into reusable form. The pulp which is obtained is colored and bleaching is performed to remove the color. The chemicals which are used for bleaching are hydrogen peroxide, sodium hydrosulfite or sodium dithionite. These chemicals helps in deinking of the pulp and increasing brightness. 
Thus, the correct answer is option D.
Multiple choice biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling plastic waste thermocol reduce, recycle, reuse

During paper recycling, .......... is used to bleach pulp.

  1. Bleaching powder

  2. Hydrogen peroxide

  3. Water

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Paper recycling is a process wherein, the paper that is used, discarded by the consumer, is collected and transported to paper mills. The papers are mixed with water and chemicals, broken down, converted into paper pulp and transformed into reusable form. The pulp is colored and bleaching is performed to remove the color. The chemicals which are used for bleaching are hydrogen peroxide, sodium hydrosulfite or sodium dithionite. These chemicals help in deinking of the pulp and increasing brightness. 

Thus, the correct answer is option B. 

Multiple choice zoology garbage in, garbage out plastic waste recycling of paper thermocol

Plastic can cause flood because

  1. It blocks the drainage system.

  2. It blocks the pores of soil.

  3. It pollutes water body

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plastic waste does not biodegrade and often accumulates in drainage systems, causing blockages that lead to urban flooding during heavy rains.

Multiple choice zoology garbage in, garbage out plastic waste recycling of paper thermocol

Air pollution can be caused by

  1. Burning of paper

  2. Burning of plastic

  3. Recycling of plastic

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Burning paper and plastic releases harmful gases and particulate matter into the atmosphere, contributing to air pollution. Recycling processes can also involve emissions.

Multiple choice zoology garbage in, garbage out plastic waste recycling of paper thermocol

Plastic can .......... the soil fertility

  1. Increases

  2. Decreases

  3. Neutral

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plastic waste in soil prevents water and nutrient absorption, creates physical barriers for roots, and leaches chemicals, all of which decrease soil fertility.